Welding tool and welding method for driving frame of cargo construction hoist

Abstract

The present invention discloses a welding fixture for a cargo construction elevator drive frame, comprising a base platform and a first slider mechanism, a second slider mechanism, a third slider mechanism, a flip mechanism, a connecting pin, a mainboard positioning pin, a mounting tube positioning device, a lug positioning device, a locking device, a thrust device, a first quick clamp, and a second quick clamp installed on the base platform. The first slider mechanism, the second slider mechanism, the third slider mechanism, the mainboard positioning pin, the mounting tube positioning device, the lug positioning device, and the locking device are each provided in two groups. On the symmetrical mounting base platform, the first slider mechanism, the second slider mechanism, the third slider mechanism, and the mounting tube positioning device are all connected to a thrust device. The fixture can be used to complete welding on the fixture, and the use of a quick clamp for clamping and positioning can greatly reduce welding deformation or have anti-deformation capabilities, while ensuring the position and size of key components.

Description

Technical Field

[0001] The present invention relates to the technical field of construction elevators, and in particular to a welding tool and a welding method for a driving frame of a cargo construction elevator. Background Art

[0002] Freight construction elevators are commonly used in construction to transport cargo, primarily for transporting construction materials to high altitudes. They consist of a guide frame, drive system, cage, electronic control system, and safety system. The lifting motion of a freight construction elevator is primarily driven by the drive system, which drives the cage along the guide frame. The drive system, powered by the electronic control system, drives the elevator, providing space for cargo transportation. The safety system ensures the safe operation of the equipment. The drive frame is the main component of the drive system, housing the motor, reducer, drive gear, and other components. The motor and reducer, powered by electricity, mesh the drive gear with the rack on the guide frame, enabling the elevator to ascend and descend. Upper and lower load-bearing wheels and side rollers attached to the drive frame secure the elevator to the guide frame. The drive system connects to the cage via lugs in the drive frame, driving the cage. Therefore, the precision of the drive frame is crucial to the stable operation of the drive system and the overall quality of the elevator, significantly impacting its smooth operation and equipment life.

[0003] The drive frame primarily consists of a main plate, seat plate, bottom plate, mounting tube, bushing, safety hook, ear plate connecting plate, ear plates, and reinforcement plates. The main plate is the main body of the drive frame, with the ear plates welded to it via the ear plate connecting plate. All other components are welded to the main body. The seat plate has mounting holes for the side rollers; the main plate has welding holes for the mounting tube and bushing. The mounting tube is used to install the upper and lower load-bearing wheels, and the bushing is used to install the safety pin. The ear plates connect to the cage.

[0004] Currently, the main method for welding drive frames is to utilize the inherent rigidity of the material, mark and position each welding position according to the designed dimensions, and then use simple tooling to position and fix the above components during spot welding. After the overall spot welding is completed, it is supplemented with reinforcing rods to increase the structural rigidity, and finally repair welding is performed. Due to the shrinkage deformation of the mainboard during bending and the welding thermal deformation during the welding process, this method causes the non-welded side edges of the mainboard to shrink inward after welding is completed and cooled. This makes it impossible to ensure the parallelism of the two sides of the mainboard, that is, the horizontal distance and vertical height of the connecting pipe cannot be guaranteed. The product accuracy cannot be met, and even post-weld correction cannot meet the use requirements. To compensate for welding deviations, the drive frame generally needs to be processed as a whole after welding, and the overall processing cost is relatively high. Summary of the Invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a welding tooling and welding method for a cargo construction elevator drive frame, which can realize welding on the tooling, and is assisted by quick clamping and positioning to greatly reduce welding deformation, or have anti-deformation capabilities, while ensuring the position and size of key components.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a welding tool for a cargo construction elevator drive frame, comprising a base platform and a first slider mechanism, a second slider mechanism, a third slider mechanism, a flip mechanism, a connecting pin, a mainboard positioning pin, a mounting tube positioning device, an ear plate positioning device, a locking device, a thrust device, a first quick clamp, and a second quick clamp installed on the base platform, wherein the first slider mechanism, the second slider mechanism, the third slider mechanism, the mainboard positioning pin, the mounting tube positioning device, the ear plate positioning device, and the locking device are each provided with two groups, and the first slider mechanism, the second slider mechanism, the third slider mechanism, and the mounting tube positioning device are all connected to the thrust device, the first slider mechanism is connected to the thrust device through a connecting pin, the second quick clamp is installed on the first slider mechanism, and the second slider mechanism and the third slider mechanism are both connected to the flip mechanism, and the first quick clamp is provided with six groups, which are respectively installed on the base mounting platform and adapted to the position of the drive frame.

[0007] In the above technical solution, the first slider mechanism includes a first slide rail pair, a first sliding seat, and a seat plate positioning shaft. The first slide rail pair is installed on the base platform. The first slide rail pair is provided with a first sliding seat. One end of the first sliding seat is connected to the connecting pin, and the other end is connected to the seat plate positioning shaft. The second quick clamp is installed on the first sliding seat.

[0008] In the above technical solution, one end of the connecting pin is a ball head structure and the other end is provided with a thread. The end with the ball head structure is connected to the first sliding seat, and the end with the thread is connected to the thrust device.

[0009] In the above technical solution, the second slider mechanism includes a second slide rail pair, a second sliding seat, and a mounting tube positioning shaft. The second slide rail pair is installed on the base platform, and a second sliding seat is provided on the second slide rail pair. The mounting tube positioning shaft is connected to the second sliding seat.

[0010] In the above technical solution, the third slider mechanism includes a third slide rail pair, a third sliding seat, and a sleeve positioning shaft. The third slide rail pair is installed on the base platform, and a third sliding seat is provided on the third slide rail pair. The sleeve positioning shaft is connected to the third sliding seat.

[0011] In the above technical solution, the flipping mechanism includes a central axis, a flipping frame, a clamping screw, a pressure head, and a rocker. The flipping frame is a U-shaped structure. The central axis is passed through one end of the flipping frame. The clamping screw is passed through the flipping frame, one end of which is connected to the pressure head, and the other end is connected to the rocker. The clamping screw rotates through the rocker, thereby driving the pressure head to move back and forth. The second sliding seat and the third sliding seat are both provided with ear plates connected to the central axis. The central axis passes through the mounting hole on the ear plate, so that the second sliding seat and the third sliding seat are both connected to the flipping mechanism.

[0012] In the above technical solution, the mainboard positioning pin has an upper umbrella-shaped structure and a lower cylindrical structure. The lower part of the mainboard positioning pin is connected to the mounting platform, and the upper umbrella-shaped structure facilitates placing the mainboard in place.

[0013] In the above technical solution, the mounting tube positioning device includes a positioning seat, a positioning sleeve, a mounting tube positioning shaft, a positioning block, and a connecting shaft. The positioning seat is installed on the base platform, and the positioning sleeve is passed through the positioning seat to provide positioning for the mounting tube positioning shaft moving along its axial direction. The positioning block is installed at one end of the mounting tube positioning shaft, and the other end of the mounting tube positioning shaft is provided with a connecting shaft, which is connected to the thrust device.

[0014] In the above technical solution, the ear plate positioning device includes an ear plate positioning seat, a pin shaft, a connecting ear plate positioning shaft, and a nut. The ear plate positioning seat is installed on the base platform; the pin shaft is passed through the ear plate positioning seat, the connecting ear plate positioning shaft is passed through the ear plate positioning seat, and the nut is installed on the threaded rod on one side of the connecting ear plate positioning shaft.

[0015] In the above technical solution, the locking device includes a double-headed screw, a top screw, a pressure plate, and a tightening handwheel. The double-headed screw is connected to the base platform, and the top screw is installed on the base platform. A key-shaped column is provided in the middle of the aforementioned double-headed screw. The pressure plate is passed through the key-shaped column of the double-headed screw and presses the top screw. The tightening handwheel is installed on one end of the double-headed screw through a thread.

[0016] In the above technical solution, the thrust device is one or both of a pneumatic cylinder and a hydraulic cylinder.

[0017] A method for welding a welding tool for a driving frame of a cargo construction hoist comprises the following steps:

[0018] (1) Place the mainboard in the middle of the base platform, align the mainboard positioning pins, ensure that the mainboard is in the correct position of the base platform, and use the locking device and the first quick clamp to fix the mainboard; use the thrust device to push the second slider mechanism and the third slider mechanism to the specified position, and then use the flip mechanism on the second slider mechanism and the third slider mechanism to press and fix the side surface of the mainboard to ensure the inner spacing of the side panels;

[0019] (2) Place the seat plate in the corresponding position of the main plate, use the thrust device to push the first slider mechanism to the specified position, place the seat plate above the end of the sliding seat, and use the seat plate positioning shaft to pass through the holes on the seat plate and the first sliding seat, and then use the second quick clamp to press the seat plate positioning shaft to tighten it;

[0020] (3) Place the bottom plate, safety hook, ear plate connecting plate and reinforcement plate in the corresponding positions according to the design requirements, fix them by spot welding, and strengthen the overall rigidity of the main plate;

[0021] (4) Place the ear plate under the ear plate connecting plate to ensure vertical contact, use the ear plate positioning device to clamp the ear plate and complete the welding;

[0022] (5) First, fully weld the root position on the inner side of the mainboard, and then weld and fix the rest of the position. After completion, loosen the flip mechanism that fixes the side surface of the mainboard and allow it to shrink naturally.

[0023] (6) Place the upper load-bearing wheel mounting tube and the shaft sleeve in the through hole on the side elevation of the main board, use the second slider mechanism and the third slider mechanism to position the horizontal position and vertical height of the upper load-bearing wheel mounting tube and the shaft sleeve, the upper load-bearing wheel mounting tube and the shaft sleeve are close to the elevation of the sliding seat, and are positioned using the positioning shaft; use the mounting tube positioning device to position the horizontal position and vertical height of the lower load-bearing wheel mounting tube, the lower load-bearing wheel mounting tube is close to the positioning block; after placing in place, weld and fully weld the mounting tube and the shaft sleeve;

[0024] (7) After welding is completed, loosen the locking device, the first quick clamp, and the second quick clamp, and use the thrust device to loosen the first slider mechanism, the second slider mechanism, the third slider mechanism, and the mounting tube positioning device, remove the mainboard positioning pin, and remove the product.

[0025] The beneficial effects of the present invention are as follows: by positioning, clamping, and correcting the deformation of the mainboard's side elevation, the effects of bending shrinkage and welding deformation on the mainboard's side elevation position and size are reduced; at the same time, by welding the mounting tube and sleeve after the mainboard has shrunk, the effects of the former's deformation and shrinkage on the latter's position and size are reduced, thereby improving product quality. The use of a thrust device and a quick clamp for clamping and positioning improves work efficiency and labor intensity. The innovative use of a slider mechanism in tooling simplifies positioning in the direction of the slide rails, and the use of a sliding seat also makes positioning of planes and holes horizontal or perpendicular to the direction of the slide rails more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 2 It is the front view of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the first slider structure of the present invention.

[0029] Figure 4 Schematic diagram of the structure of the second slider structure of the present invention.

[0030] Figure 5 Schematic diagram of the structure of the third slider structure of the present invention.

[0031] Figure 6 It is a schematic structural diagram of the turning mechanism of the present invention.

[0032] Figure 7 It is a schematic diagram of the connecting pin structure of the present invention.

[0033] Figure 8 This is a schematic diagram of the mainboard positioning pin structure of the present invention.

[0034] Figure 9 It is a structural schematic diagram of the installation pipe positioning device of the present invention.

[0035] Figure 10 It is a structural schematic diagram of the ear plate positioning device of the present invention.

[0036] Figure 11 It is a structural schematic diagram of the locking device of the present invention.

[0037] Figure 12 It is a schematic structural diagram of the drive frame of the present invention.

[0038] Among them, 1. base platform, 2. first slider mechanism, 3. second slider mechanism, 4. third slider mechanism, 5. flip mechanism, 6. connecting pin, 7. mainboard positioning pin, 8. mounting tube positioning device, 9. ear plate positioning device, 10. locking device, 11. thrust device, 12. first quick clamp, 13. second quick clamp, 14. drive frame, 15. slide rail, 16. side slider, 17. first sliding seat, 18. seat plate positioning shaft, 19. second sliding seat, 20. mounting tube positioning shaft, 21. third sliding seat, 22. sleeve positioning shaft, 23. center shaft, 24. Flip frame, 25. Clamping screw, 26. Pressure head, 27. Rocker, 28. Positioning seat, 29. Positioning sleeve, 30. Mounting tube positioning shaft, 31. Positioning block, 32. Connecting shaft, 33. Ear plate positioning seat, 34. Pin, 35. Connecting ear plate positioning shaft, 36. Nut, 37. Double-headed screw, 38. Top screw, 39. Press plate, 40. Tightening handwheel, 41. Main board, 42. Seat plate, 43. Bottom plate, 44. Upper load-bearing wheel mounting tube, 45. Lower load-bearing wheel mounting tube, 46. Bushing, 47. Safety hook, 48. Ear plate connecting plate, 49. Ear plate, 50. Reinforcement plate. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 12 As shown, the drive frame 14 includes a main board 41, a seat plate 42, a bottom plate 43, an upper load-bearing wheel mounting tube 44, a lower load-bearing wheel mounting tube 45, a shaft sleeve 46, a safety hook 47, an ear plate connecting plate 48, an ear plate 49, and a reinforcement plate 50. The drive frame is a cargo construction elevator drive frame.

[0041] like Figure 1 and Figure 2 The welding tooling of a cargo construction elevator drive frame shown in the figure includes a base platform 1 and a first slider mechanism 2, a second slider mechanism 3, a third slider mechanism 4, a flip mechanism 5, a connecting pin 6, a mainboard positioning pin 7, a mounting tube positioning device 8, an ear plate positioning device 9, a locking device 10, a thrust device 11, a first quick clamp 12, and a second quick clamp 13 installed on the base platform 1. The first slider mechanism 2, the second slider mechanism 3, the third slider mechanism 4, the mainboard positioning pin 7, the mounting tube positioning device 8, the ear plate positioning device 9, and the locking device 10 are each provided with two groups, and are symmetrically installed on the base platform 1. The first slider mechanism 2, the second slider mechanism 3, the third slider mechanism 4, and the mounting tube positioning device 8 are all connected to the thrust device 11. The first slider mechanism 2 is connected to the thrust device 11 through the connecting pin 6. The second quick clamp 13 is installed on the first slider mechanism 2. The second slider mechanism 3 and the third slider mechanism 4 are both connected with the flip mechanism 5. The first quick clamp 12 is provided with six groups, which are respectively installed on the base mounting platform 1 and adapted to the position of the drive frame 14.

[0042] like Figure 3 As shown, the first slider mechanism includes a first slide rail pair, a first sliding seat 17, and a seat plate positioning shaft 18. The first slide rail pair is installed on the base platform 1. The first slide rail pair includes a slide rail 15 and a side slider 16. The side slider 16 is provided with a first sliding seat 17. One end of the first sliding seat 17 is connected to the connecting pin 6, and the other end is connected to the seat plate positioning shaft 18. The second quick clamp 13 is installed on the first sliding seat 17.

[0043] The base platform 1 is machined as a whole, with numerous round and threaded holes of varying sizes and depths machined onto its surface. Use locating pins and bolts to install the slide rails 15 in the first, second, and third slider mechanisms 2, 3, and 4, as well as the locating seats 28 in the mounting tube locating device 8 and the lug locating seats 33 in the lug locating device 9. Bolts are used to install the thrust device 11, the first quick-release clamp 12, and the second quick-release clamp 13. The mainboard locating pins 7, the stud screw 37, and the jackscrew 38 in the locking device 10 are directly installed.

[0044] like Figure 7As shown, one end of the connecting pin 6 is a ball head structure and the other end is provided with a thread. The end with the ball head structure is connected to the first sliding seat 17, and the end with the thread is connected to the thrust device 11.

[0045] The side slider 16 and the first sliding seat 17 are connected to each other by positioning pins and bolts, and the first sliding seat 17 and the slide rail 15 are prompted to move along the same axis; one end of the first sliding seat 17 is connected to one side of the ball head of the connecting pin 6, and the other end has a horizontal platform for placing and positioning the seat plate 42. There is a through hole in the platform that is exactly positioned with the through hole in the seat plate through the seat plate positioning shaft 18, and it is tightened by the quick clamp 2 13 installed on the upper surface of the first sliding seat 17.

[0046] like Figure 4 As shown, the second slider mechanism includes a second slide rail pair, a second sliding seat 19, and a mounting tube positioning shaft 20. The second slide rail pair is installed on the base platform 1. The second slide rail pair includes a slide rail 15 and a side slider 16. The side slider 16 is provided with a second sliding seat 19. The mounting tube positioning shaft 20 is connected to the second sliding seat 19.

[0047] The lower left side of the second sliding seat 19 is connected to the thrust device 11 by bolts, and the upper ear plate is installed with the central axis 23 in the flip mechanism 5. The vertical height and horizontal position of the upper load-bearing wheel mounting tube 44 can be positioned through the surface of the second sliding seat 19 and the mounting tube positioning axis 20.

[0048] like Figure 5 As shown, the third slider mechanism includes a third slide rail pair, a third sliding seat 21, and a sleeve positioning shaft 22. The third slide rail pair is installed on the base platform 1. The third slide rail pair includes a slide rail 15 and a side slider 16. The side slider 16 is provided with a third sliding seat 21. The sleeve positioning shaft 22 is connected to the third sliding seat 21.

[0049] The lower part of the third sliding seat 21 is connected to the thrust device 11 by bolts, and the upper ear plate is installed with the central axis 23 of the flip mechanism 5. The vertical height and horizontal position of the sleeve 46 can be positioned through the surface of the third sliding seat 21 and the sleeve positioning axis 22.

[0050] like Figure 6 As shown, the flip mechanism includes a central axis 23, a flip frame 24, a clamping screw 25, a pressure head 26, and a rocker 27. The flip frame 24 is a U-shaped structure. The central axis 23 is passed through one end of the flip frame 24. The flip frame 24 can rotate around the central axis 23. The clamping screw 25 is passed through the flip frame 24, one end of which is connected to the pressure head 25, and the other end is connected to the rocker 27. The rocker 27 passes through the through hole at the end of the clamping screw 25. The clamping screw 25 rotates through the rocker 27, thereby driving the pressure head 26 to move back and forth. When it moves toward the central axis, it can press the side plate of the main board 41.

[0051] The second sliding seat and the third sliding seat are both provided with ear plates connected to the central shaft 23. The central shaft 23 passes through the mounting holes on the ear plates, so that the second sliding seat 3 and the third sliding seat 4 are both connected to the flip mechanism.

[0052] like Figure 8 As shown, the mainboard positioning pin 7 has an umbrella-shaped upper portion and a cylindrical lower portion. The lower portion of the mainboard positioning pin is directly mounted on the mounting platform 1, and the upper umbrella-shaped structure facilitates the placement of the mainboard. The umbrella-shaped structure at the upper end of the mainboard positioning pin 7 is specifically a truncated cone structure, providing positioning for the mainboard 41. The cone shape makes it easier to place the mainboard 41 in place.

[0053] like Figure 9 As shown, the mounting tube positioning device includes a positioning seat 28, a positioning sleeve 29, a mounting tube positioning shaft 30, a positioning block 31, and a connecting shaft 32. The positioning seat 28 is installed on the base platform 1 by positioning pins and bolts. The positioning sleeve 29 is passed through the positioning seat 28 to provide positioning for the mounting tube positioning shaft 30 that moves along its axial direction. The positioning block 31 is installed at one end of the positioning shaft and cooperates with the movement of the mounting tube positioning shaft 30 to position the vertical height and horizontal position of the lower load-bearing wheel mounting tube 45. The other end of the mounting tube positioning shaft 30 is provided with a connecting shaft 32, which is connected to the thrust device 11, so that the thrust device 11 can drive the use of the device.

[0054] like Figure 10 As shown, the ear plate positioning device includes an ear plate positioning seat 33, a pin shaft 34, a connecting ear plate positioning shaft 35, and a nut 36. The ear plate positioning seat 33 is installed on the base platform 1 through a positioning pin and a bolt; the pin shaft 34 is passed through the ear plate positioning seat 33, the connecting ear plate positioning shaft 35 is passed through the ear plate positioning seat 33, and the nut 36 is installed on a threaded rod on one side of the connecting ear plate positioning shaft 35.

[0055] The pin 34 can pass through the circular holes on the ear plate positioning seat 33 and the ear plate 49, so that the holes are guaranteed to be on the same axis; the connecting ear plate positioning shaft 35 can also pass through the ear plate positioning seat 33 and another circular hole on the ear plate 49, and at the same time use the nut 36 to be installed on the threaded rod on one side of the connecting ear plate positioning shaft 35, so that the holes are guaranteed to be on the same axis and pressed into position.

[0056] like Figure 11 As shown, the locking device includes a double-headed screw 37, a top screw 38, a pressure plate 39, and a tightening handwheel 40. The double-headed screw 37 is connected to the base platform 1 through a thread, and the top screw 38 is directly installed on the base platform 1. A key-shaped column is provided in the middle of the double-headed screw 37. The pressure plate 39 is passed through the key-shaped column of the double-headed screw 37 and presses the top screw 38. The tightening handwheel 40 is installed at one end of the double-headed screw 37 through a thread.

[0057] The pressure plate 39 passes through the hole in the stud 37 and is placed on the middle key-shaped column, pressing the jackscrew 38. The tightening hand wheel 40 is threadedly installed on the screw on the other side of the stud 37. When in use, push the pressure plate 39 to press the main board 41, and rotate the tightening hand wheel 40 to tighten the main board. When disassembling, use the reverse method.

[0058] In the above technical solution, the thrust device 11 is one or both of a pneumatic cylinder and a hydraulic cylinder. During use, the first slider mechanism 2, second slider mechanism 3, third slider mechanism 4, and mounting tube positioning device 8 are pushed toward the center of the base platform 1 to position the drive frame's seat plate 42, upper load-bearing wheel mounting tube 44, bushing 46, and lower load-bearing wheel mounting tube 45, respectively. The first and second quick clamps 12, 13 can be of varying specifications, depending on the specific situation. Alternatively, pneumatic cylinder linkage can be employed to reduce assembly and disassembly time and achieve compression between the main plate 41 and seat plate 42.

[0059] A method for welding a welding tool for a driving frame of a cargo construction hoist comprises the following steps:

[0060] (1) Place the mainboard 41 in the middle of the base platform, align the mainboard positioning pin 7, ensure that the mainboard is in the correct position of the base platform 1, and use the locking device 10 and the first quick clamp 12 to fix the mainboard; use the thrust device 11 to push the second slider mechanism 3 and the third slider mechanism 4 to the specified position, and then use the flip mechanism 5 on the second slider mechanism 3 and the third slider mechanism 4 to press and fix the side surface of the mainboard 41 to ensure the inner spacing of the side panels;

[0061] (2) Place the seat plate 42 at the corresponding position of the main plate, use the thrust device 11 to push the first slider mechanism 2 to the specified position, place the seat plate 42 above the end of the sliding seat, and use the seat plate positioning shaft 18 to pass through the holes on the seat plate and the first sliding seat 17, and then use the second quick clamp 13 to press the seat plate positioning shaft 18 to tighten it;

[0062] (3) Place the bottom plate 43, safety hook 47, ear plate connecting plate 48, and reinforcement plate 50 in the corresponding positions according to the design requirements, and fix them by spot welding to strengthen the overall rigidity of the main plate 41;

[0063] (4) Place the ear plate 49 below the ear plate connecting plate 48 to ensure vertical contact, and use the ear plate positioning device 9 to clamp and fix the ear plate to complete the welding;

[0064] (5) First, fully weld the inner root of the main board 41, and then weld the rest of the main board. After completion, loosen the flip mechanism 5 that fixes the side of the main board to allow it to shrink naturally.

[0065] (6) Place the upper load-bearing wheel mounting tube 44 and the shaft sleeve 46 in the through hole on the side elevation of the main board, use the second slider mechanism 3 and the third slider mechanism 4 to position the horizontal position and vertical height of the upper load-bearing wheel mounting tube 44 and the shaft sleeve 46, so that the upper load-bearing wheel mounting tube 44 and the shaft sleeve 46 are close to the elevation of the sliding seat, and use the mounting tube positioning shaft 30 to position; use the mounting tube positioning device 8 to position the horizontal position and vertical height of the lower load-bearing wheel mounting tube 45, so that the lower load-bearing wheel mounting tube 45 is close to the positioning block 31; after placing in place, weld and fully weld the mounting tube and the shaft sleeve;

[0066] (7) After welding is completed, loosen the locking device 10, the first quick clamp 12, and the second quick clamp 13, and use the thrust device 11 to loosen the first slider mechanism 2, the second slider mechanism 3, the third slider mechanism 4, and the mounting tube positioning device 8, remove the mainboard positioning pin 7, and remove the product.

[0067] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A welding tool for a cargo construction hoist drive frame, characterized by: The cam is connected to the first slide mechanism and the second slide mechanism is connected to the first slide mechanism by a connecting pin and a connecting pin of the cam. The 3rd sliding seat is provided with a third sliding seat, and the 3rd sliding seat is connected with the third sliding seat by the third sliding seat.

2. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: One end of the connecting pin is a ball head structure and the other end is provided with a thread. The end with the ball head structure is connected to the first sliding seat, and the end with the thread is connected to the thrust device.

3. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: The flipping mechanism includes a central axis, a flipping frame, a clamping screw, a pressure head, and a rocker. The flipping frame is a U-shaped structure. The central axis is passed through one end of the flipping frame. The clamping screw is passed through the flipping frame. One end of the clamping screw is connected to the pressure head, and the other end is connected to the rocker. The clamping screw rotates through the rocker, thereby driving the pressure head to move back and forth. The second sliding seat and the third sliding seat are both provided with ear plates connected to the central axis. The central axis passes through the mounting hole on the ear plate, so that the second sliding seat and the third sliding seat are both connected to the flipping mechanism.

4. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: The mainboard positioning pin has an upper umbrella-shaped structure and a lower cylindrical structure. The lower part of the mainboard positioning pin is connected to the mounting platform, and the upper umbrella-shaped structure facilitates placing the mainboard in place.

5. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: The ear plate positioning device includes an ear plate positioning seat, a pin shaft, a connecting ear plate positioning shaft, and a nut. The ear plate positioning seat is installed on the base platform; the pin shaft is passed through the ear plate positioning seat, the connecting ear plate positioning shaft is passed through the ear plate positioning seat, and the nut is installed on the threaded rod on one side of the connecting ear plate positioning shaft.

6. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: The locking device includes a double-headed screw, a top screw, a pressure plate, and a tightening handwheel. The double-headed screw is connected to the base platform, and the top screw is installed on the base platform. A key-shaped column is provided in the middle of the double-headed screw. The pressure plate is passed through the key-shaped column of the double-headed screw and presses the top screw. The tightening handwheel is installed at one end of the double-headed screw through a thread.

7. The welding fixture for the driving frame of a cargo construction hoist according to claim 1 is characterized by: The thrust device is one or both of an air cylinder and a hydraulic cylinder.

8. The method for welding the welding fixture of the driving frame of a cargo construction hoist according to claim 1, comprising the following steps: (1) Place the motherboard in the middle of the base platform, align the motherboard positioning pins, ensure that the motherboard is in the correct position of the base platform, and use the locking device and the first quick clamp to fix the motherboard; use the thrust device to push the second slider mechanism and the third slider mechanism to the specified position, and then use the flip mechanism on the second slider mechanism and the third slider mechanism to press and fix the side surface of the motherboard to ensure the inner spacing of the side panels; (2) Place the seat plate in the corresponding position of the main plate, use the thrust device to push the first slider mechanism to the specified position, place the seat plate above the end of the sliding seat, and use the seat plate positioning shaft to pass through the holes on the seat plate and the first sliding seat, and then use the second quick clamp to press the seat plate positioning shaft to tighten; (3) Place the bottom plate, safety hook, ear plate connecting plate, and reinforcement plate in the corresponding positions according to the design requirements, and fix them by spot welding to strengthen the overall rigidity of the main plate; (4) Place the ear plate under the ear plate connecting plate to ensure vertical contact, use the ear plate positioning device to clamp the ear plate and complete the welding; (5) First, fully weld the root position on the inner side of the mainboard, and then weld and fix the rest of the position. After completion, loosen the flip mechanism that fixes the side surface of the mainboard and allow it to shrink naturally. (6) Place the upper road wheel mounting tube and the shaft sleeve in the through hole on the side elevation of the main board, use the second slider mechanism and the third slider mechanism to position the horizontal position and vertical height of the upper road wheel mounting tube and the shaft sleeve, so that the upper road wheel mounting tube and the shaft sleeve are close to the elevation of the sliding seat, and are positioned using the positioning shaft; use the mounting tube positioning device to position the horizontal position and vertical height of the lower road wheel mounting tube, so that the lower road wheel mounting tube is close to the positioning block; after placing in place, weld and fully weld the mounting tube and the shaft sleeve; (7) After welding is completed, loosen the locking device, the first quick clamp, and the second quick clamp, and use the thrust device to loosen the first slider mechanism, the second slider mechanism, the third slider mechanism, and the mounting tube positioning device, remove the mainboard positioning pin, and remove the product.

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